Probabilities

Which of the following shows how to determine P(shaded number or number less than five)?

• 4/8 + 4/8 - 2/8

• 4/9 + 2/8 - 4/8

• 4/8 + 6/8 + 2/8

• 2/8 + 4/8 - 4/8

If you roll one die, what is the probability of getting an odd number or a 4?

• 2/3

• 1/3

• 1/2

• 1/6

The chance of rolling a 2 is 1/6. What is the chance of not rolling a 2?

• 2/6

• 1/6

• 5/6

• Not possible

A bag contains 9 green marbles, 5 yellow marbles and 6 red marbles.  You choose one marble.   What is the probability of selecting a green or red marble?

• 8/15

• 6/11

• 3/4

• 2/3

A spinner is divided into 4 equally sized selections. The sections are blue, green, red, and yellow. The results of 1000 spins are shown in the table.

What is the experimential probability of spinning a green? (use a reduced fraction)

Mathematical Equivalence

ON

Vy is shopping for a car. It comes in red, blue, or silver. She can also choose a 2-door and 4-door version along with a manual or automatic transmission. What is the theoretical probability that Vy will pick 4-door car, automatic transmission and it being red or blue?

Mathematical Equivalence

ON

Is the scenario Mutually Exclusive or Mutually Inclusive?

Find the probability of spinning a spinner with 8 equal sections #1-8 and getting an odd # or multiple of 4.

• Mutually Exclusive

• Mutually Inclusive

Which of the following shows how to determine P(odd number or shaded number)?

• 4/8 + 3/8 - 1/8

• 3/8 + 6/8 - 4/8

• 4/8 - 5/8 + 3/8

• 4/8 + 4/8 - 4/8

Which of the following shows how to determine when a die is rolled P(multiple of 2 or a multiple of 3)?

• 2/6 + 1/6 - 3/6

• 4/6 + 2/6 - 1/6

• 3/6 + 2/6 - 1/6

• 5/6 + 1/6 - 3/6

A bag contains 9 green marbles, 5 yellow marbles and 6 red marbles.  You choose one marble.   What is the probability of selecting a green or red marble?  Do you add or multiply probabilities?

• Add

• Multiply